频域宽带波束形成算法

Frequency broadband beamforming algorithm

宽带线性调频信号应用于相控阵雷达系统时,需采用宽带波束形成处理抑制宽带干扰。宽带波束形成会对线性调频信号的脉压结果造成影响,该文提出一种频域宽带波束形成算法,对数据先做快速Fourier变换再分频率柜进行宽带波束形成,在保证脉压处理性能的同时控制了运算量。该算法的运算量只有滑窗方法的10%左右。仿真结果表明:该算法能有效地进行宽带波束形成抑制宽带干扰、保证脉压结果的性能。该算法更适合实时性要求高的相控阵雷达应用中。

In the application of broadband phased array radar, broadband beamforming that can reject broadband interferences may have influence on the pulse compression of linear frequency modulation signal. The pulse compression performance after broadband beamforming can be improved by first transforming the data to the frequency domain using a fast Fourier transform （FFT）. The data is then beamformed in each frequency bin, which facilitates pulse compression. Simulations show that this method maintains the broadband beamforming and pulse compression performance of the sliding window method with only 10% of the computational costs. Thus the algorithm is more suitable for real-time radar signal processing.